/*
 * @file    3sum.cpp
 * @author  libo <libo@tencent.com>
 * @date    2013-04-02
 * @brief   
 * */

#include <iostream>
#include <vector>
#include <set>

set<vector<int> > find_triplets(vector<int> arr) {

}

int main() {

}
